/* roulang page: index */
:root {
      --primary: #7B2FF7;
      --primary-glow: rgba(123, 47, 247, 0.6);
      --accent: #FF6B35;
      --bg-deep: #0A0E17;
      --bg-card: #131A26;
      --text-primary: #FFFFFF;
      --text-body: #B0C4DE;
      --text-muted: #6B7A8E;
      --border-glass: rgba(123, 47, 247, 0.25);
      --radius-lg: 16px;
      --radius-md: 12px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, -apple-system, sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s, opacity 0.2s;
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
    }

    /* 自定义滚动条隐藏（移动端频道tabs） */
    .scrollbar-hide::-webkit-scrollbar {
      display: none;
    }
    .scrollbar-hide {
      -ms-overflow-style: none;
      scrollbar-width: none;
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: rgba(19, 26, 38, 0.7);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
    }

    /* 发光按钮 */
    .btn-glow {
      background: var(--primary);
      color: white;
      border: none;
      border-radius: 30px;
      padding: 12px 28px;
      font-weight: 600;
      font-size: 16px;
      box-shadow: 0 0 20px var(--primary-glow);
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px #FF6B35, 0 0 20px var(--primary-glow);
      background: #8B45F7;
      transform: translateY(-1px);
    }

    .btn-ghost {
      background: transparent;
      border: 1px solid var(--primary);
      color: var(--primary);
      border-radius: 30px;
      padding: 12px 28px;
      font-weight: 600;
      font-size: 16px;
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-ghost:hover {
      background: var(--primary);
      color: white;
      box-shadow: 0 0 16px var(--primary-glow);
    }

    /* 频道Tabs pill */
    .tab-pill {
      background: rgba(255,255,255,0.05);
      color: var(--text-muted);
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 15px;
      font-weight: 500;
      white-space: nowrap;
      transition: all 0.25s;
      border: 1px solid transparent;
    }
    .tab-pill.active, .tab-pill:hover {
      background: var(--primary);
      color: white;
      border-color: var(--primary);
      box-shadow: 0 0 12px var(--primary-glow);
    }

    /* 手风琴动画 */
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease-in-out;
    }
    .faq-item.active .faq-content {
      max-height: 200px;
    }

    /* 数据跑马灯 */
    @keyframes scrollData {
      0% { transform: translateX(0); }
      100% { transform: translateX(-50%); }
    }
    .marquee-track {
      display: flex;
      animation: scrollData 20s linear infinite;
      width: fit-content;
    }